CN210461717U

CN210461717U - Backflow prevention butterfly valve

Info

Publication number: CN210461717U
Application number: CN201921077541.9U
Authority: CN
Inventors: 王利江
Original assignee: Wuxi Ede Valve Industry Co ltd
Current assignee: Wuxi Ede Valve Industry Co ltd
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-05-05
Anticipated expiration: 2029-07-11

Abstract

The utility model provides a prevent down-flow butterfly valve relates to the butterfly valve field. This prevent down-flow butterfly valve, which comprises a valve body, the valve body is for controlling to link up the column structure, the inside of valve body is provided with the butterfly plate, the butterfly plate sets up perpendicularly, two fixed blocks of right flank fixedly connected with of butterfly plate, the inside of two fixed blocks is fixed pegs graft and is had the pivot, the pivot is located the one end of two fixed block belows and pegs graft in the interior diapire of valve body and rotate with the valve body and be connected, the one end that the pivot is located two fixed block tops runs through the valve body, the last fixed surface of valve body is connected with changes the cover, the one end that the pivot is located the valve body top is pegged graft in the inside of changeing the. This prevent down-flow butterfly valve through setting up backward flow valve plate and non return stopper, can not cause the effect of liquid backward flow when having reached the repetition switch butterfly plate, has solved the problem that the backward flow can appear at the in-process that uses for a long time in prior art's butterfly valve and lead to the valve to damage.

Description

Backflow prevention butterfly valve

Technical Field

The utility model relates to a butterfly valve technical field specifically is a prevent down-flow butterfly valve.

Background

The butterfly valve is also called a flap valve, is a regulating valve with simple structure, and can be used for controlling the flow of various fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like. The butterfly valve mainly plays a role in cutting off and throttling on the pipeline. The opening and closing piece of the butterfly valve is a disc-shaped butterfly plate (also called a disc valve), and the disc plate rotates around the axis of the disc plate in the valve body, so that the opening and closing or the adjustment are realized.

In the process of long-time use of the butterfly valve in the prior art, due to the fact that the butterfly plate is closed and opened for many times, poor sealing can be caused, the situation can cause the phenomenon that a part of liquid flows backwards, and the problems that damage to the valve and failure in closing can be caused after a long time.

Disclosure of Invention

The utility model provides a not enough to prior art, the utility model provides a prevent down-flow butterfly valve has solved prior art's butterfly valve and can appear the problem that the backward flow leads to the valve to damage at the in-process of long-time use.

Technical scheme (I)

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a backflow prevention butterfly valve comprises a valve body, wherein the valve body is of a left-right through structure, a butterfly plate is arranged inside the valve body and is vertically arranged, two fixing blocks are fixedly connected to the right side face of the butterfly plate, a rotating shaft is fixedly inserted into the two fixing blocks, one end, located below the two fixing blocks, of the rotating shaft is inserted into the inner bottom wall of the valve body and is rotatably connected with the valve body, one end, located above the two fixing blocks, of the rotating shaft penetrates through the valve body, a rotating sleeve is fixedly connected to the upper surface of the valve body, one end, located above the valve body, of the rotating shaft is inserted into the rotating sleeve and is rotatably connected with the rotating sleeve, backflow valves are arranged on the left side face and the right side face of the valve body, the two backflow valves are of a left-right through structure, a plurality of studs are inserted into the surfaces, which are close to each other, one ends, far away from, the inside of two backwash valves all is provided with the water conservancy diversion circle, the one end that two water conservancy diversion circles were kept away from each other respectively with the inner wall fixed connection of two backwash valves, the equal articulated piece of side fixedly connected with about the butterfly plate, the inside of two articulated pieces all is provided with the pull rod, two pull rods rotate with two articulated pieces respectively and are connected, the one end that two pull rods were kept away from each other is provided with the non return stopper, the one end that the butterfly plate was kept away from to two pull rods rotates with two non return stoppers respectively and links, control two non return stoppers and be located the inside of controlling two water conservancy diversion circles respectively, the equal fixedly connected with ring flange of one end that.

Preferably, gaskets are arranged between the left end and the right end of the valve body and between the left reflux valve and the right reflux valve, the gaskets are of circular ring structures, the gaskets and the valve body are arranged concentrically, and the two gaskets are arranged in bilateral symmetry by using a vertical center line of the valve body.

Preferably, the periphery of two non return plugs is all fixed the cup joint has the rubber ring, and the rubber ring is kept away from the one end of non return plug and is contacted with the water conservancy diversion circle, and two non return plugs use the vertical center line bilateral symmetry setting of butterfly plate, and the cross section of non return plug is the trapezium structure, and the diameter of the one end that two non return plugs are close to each other is less than the diameter that one end was kept away from each other to two non return plugs.

Preferably, the cross section of the diversion rings is of a V-shaped structure, the two diversion rings are arranged in bilateral symmetry with the vertical center line of the butterfly plate, and the diameter of the end, close to each other, of the two diversion rings is smaller than the diameter of the end, far away from each other, of the two diversion rings.

Preferably, the two pull rods are respectively positioned at the front end and the rear end of the side face of the butterfly plate, the two pull rods are positioned on the same horizontal plane, and the two pull rods are distributed in an equidistant circumferential array mode according to the axial lead of the butterfly plate.

Preferably, the cross sections of the two backflow valves are both circular structures, and the two backflow valves are arranged in bilateral symmetry with the vertical center line of the valve body.

(II) advantageous effects

The utility model provides a prevent down-flow butterfly valve. The method has the following beneficial effects:

1. this prevent down-flow butterfly valve, through setting up the backward flow valve, the water conservancy diversion circle, the pull rod, butterfly plate and non return stopper, in the time of rotatory pivot, the butterfly plate begins to rotate under the rotation of pivot, it removes to drive the pull rod when the butterfly plate pivoted, two pull rods begin to remove to removing under the butterfly plate pivoted effect, further non return stopper begins to leave the water conservancy diversion circle under the drive of pull rod, reverse rotation's pivot, the non return stopper begins to be close to the inside of water conservancy diversion circle under the effect of pull rod, because the cross sectional shape of water conservancy diversion circle is the V type, can be with the effectual backward flow that reduces liquid, can not cause the effect of liquid backward flow when having reached the reopening and shutting butterfly plate, the problem that the backward flow leads to the valve to damage can appear at the in-process of having solved.

2. This prevent down-flow butterfly valve, through setting up the rubber ring, the non return stopper begins the inner wall contact with water conservancy diversion circle in the time of to the water conservancy diversion circle removal under the drive of pull rod, the non return stopper can be inseparable when screwing up the butterfly plate and the contact of water conservancy diversion circle, can guarantee like this that the valve can not produce liquid backward flow when opening, and the butterfly plate can also guarantee fine leakproofness when closing many times, the problem of butterfly valve leakproofness decline can be leaded to because mechanical wear to the butterfly valve of prior art at the in-process of long-time use has been solved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic structural view of the present invention;

fig. 4 is a schematic view of the connection between the butterfly plate and the check plug of the present invention.

The device comprises a valve body 1, a butterfly plate 2, a fixing block 3, a rotating shaft 4, a rotating sleeve 5, a reflux valve 6, a stud 7, a flow guide ring 8, a hinged block 9, a pull rod 10, a check plug 11, a flange plate 12, a gasket 13 and a rubber ring 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The embodiment of the utility model provides a backflow prevention butterfly valve, as shown in fig. 1-4, comprising a valve body 1, wherein the valve body 1 is of a left-right through structure, a butterfly plate 2 is arranged inside the valve body 1, the butterfly plate 2 is vertically arranged, two fixing blocks 3 are fixedly connected with the right side surface of the butterfly plate 2, a rotating shaft 4 is fixedly inserted inside the two fixing blocks 3, one end of the rotating shaft 4 positioned below the two fixing blocks 3 is inserted in the inner bottom wall of the valve body 1 and is rotatably connected with the valve body 1, one end of the rotating shaft 4 positioned above the two fixing blocks 3 penetrates through the valve body 1, a rotating sleeve 5 is fixedly connected with the upper surface of the valve body 1, the rotating sleeve 5 can play a role of fixing the rotating shaft 4, one end of the rotating shaft 4 positioned above the valve body 1 is inserted in the rotating sleeve 5 and is rotatably connected with the rotating sleeve, backflow valves 6 are arranged on the left and right sides, the two reflux valves 6 are arranged in bilateral symmetry with the vertical center line of the valve body 1, gaskets 13 are arranged between the left end and the right end of the valve body 1 and between the left reflux valve 6 and the right reflux valve 6, the gaskets 13 are of a circular structure, the gaskets 13 are concentrically arranged with the valve body 1, the two gaskets 13 are arranged in bilateral symmetry with the vertical center line of the valve body 1, the gaskets 13 can effectively prevent internal liquid leakage, the two reflux valves 6 are of a left-right through structure, one surfaces of the two reflux valves 6 close to each other are inserted with a plurality of studs 7, one ends of the studs 7 on the left side and the right side far away from the reflux valves 6 are respectively in threaded connection with the left side and the right side of the valve body 1, the two reflux valves 6 are communicated with the inside of the valve body 1, guide rings 8 are arranged inside the two reflux valves 6, the cross section of each guide ring 8 is of a V, the diameter of the end, close to each other, of each of the two flow guide rings 8 is smaller than the diameter of the end, far from each other, of each of the two flow guide rings 8, the end, close to each other, of each of the two flow guide rings 8 is located inside the valve body 1, the end, far from each other, of each of the two flow guide rings 8 is fixedly connected with the inner wall of each of the two backflow valves 6, each of the left and right side surfaces of the butterfly plate 2 is fixedly connected with a hinge block 9, each of the two hinge blocks 9 is internally provided with a pull rod 10, the two pull rods 10 are located at the front end and the rear end of the side surface of the butterfly plate 2 respectively, the two pull rods 10 are located on the same horizontal plane, the two pull rods 10 are distributed in an equidistant circumferential array around the axial lead of the butterfly plate 2, the two pull rods 10 are rotatably connected with the two hinge blocks 9 respectively, the end, far from, two non return stopper 11 use the vertical central line bilateral symmetry setting of butterfly plate 2, the cross section of non return stopper 11 is trapezium structure, the diameter of the one end that two non return stopper 11 are close to each other is less than the diameter that one end was kept away from each other to two non return stopper 11, the one end that butterfly plate 2 was kept away from to two pull rods 10 is rotated with two non return stopper 11 respectively and is linked, control two non return stopper 11 and be located the inside of controlling two water conservancy diversion circles 8 respectively, the equal fixedly connected with ring flange 12 of one end that two return valves 6 kept away from each other.

The working principle is that when the rotating shaft 4 is rotated, the butterfly plate 2 starts to rotate under the rotation of the rotating shaft 4, the butterfly plate 2 drives the pull rods 10 to move when rotating, the two pull rods 10 start to move left and right under the rotation effect of the butterfly plate 2, the further check plug 11 starts to leave the flow guide ring 8 under the drive of the pull rods 10, the rotating shaft 4 rotates reversely, the check plug 11 starts to approach the inner part of the flow guide ring 8 under the action of the pull rods 10, because the section of the guide ring 8 is V-shaped, the backflow of liquid can be effectively reduced, the rubber ring 14 starts to contact with the inner wall of the guide ring 8 when the check plug 11 moves towards the guide ring 8 under the driving of the pull rod 10, the check plug 11 can be tightly contacted with the guide ring 8 when the butterfly plate 2 is screwed down, therefore, liquid backflow can not be generated when the valve is opened, and good sealing performance can be guaranteed when the butterfly plate 2 is closed for multiple times.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a prevent down-flow butterfly valve, includes valve body (1), its characterized in that: the valve body (1) is of a left-right through structure, a butterfly plate (2) is arranged inside the valve body (1), the butterfly plate (2) is vertically arranged, two fixing blocks (3) are fixedly connected to the right side face of the butterfly plate (2), a rotating shaft (4) is fixedly inserted inside the two fixing blocks (3), one end, located below the two fixing blocks (3), of the rotating shaft (4) is inserted into the inner bottom wall of the valve body (1) and is rotatably connected with the valve body (1), one end, located above the two fixing blocks (3), of the rotating shaft (4) penetrates through the valve body (1), a rotating sleeve (5) is fixedly connected to the upper surface of the valve body (1), one end, located above the valve body (1), of the rotating shaft (4) is inserted into the rotating sleeve (5) and is rotatably connected with the rotating sleeve, backflow valves (6) are arranged on the left side face and the right side face of the valve body (1), the two backflow valves (6) are of a left-right through structure, a, one ends of a plurality of studs (7) at the left side and the right side, which are far away from the backflow valves (6), are respectively in threaded connection with the left side and the right side of the valve body (1), the two backflow valves (6) are communicated with the inside of the valve body (1), the insides of the two backflow valves (6) are respectively provided with a flow guide ring (8), the ends, which are far away from each other, of the two flow guide rings (8) are respectively in fixed connection with the inner walls of the two backflow valves (6), the left side and the right side of the butterfly plate (2) are respectively in fixed connection with a hinged block (9), the insides of the two hinged blocks (9) are respectively provided with a pull rod (10), the two pull rods (10) are respectively in rotary connection with the two hinged blocks (9), the ends, which are far away from the butterfly plate (2), of the two pull rods (10) are respectively in rotary connection with the two check plugs (11), the left check plug (11) and the right check, one ends of the two reflux valves (6) which are far away from each other are fixedly connected with flange plates (12).

2. A backflow prevention butterfly valve in accordance with claim 1, wherein: gaskets (13) are arranged between the left end and the right end of the valve body (1) and between the left reflux valve and the right reflux valve (6), the gaskets (13) are of a circular ring-shaped structure, the gaskets (13) and the valve body (1) are concentrically arranged, and the two gaskets (13) are arranged in bilateral symmetry with the vertical center line of the valve body (1).

3. A backflow prevention butterfly valve in accordance with claim 1, wherein: the periphery of two non return stopper (11) all fixedly cup joints rubber ring (14), and the one end and the water conservancy diversion circle (8) contact of non return stopper (11) are kept away from in rubber ring (14), and two non return stopper (11) set up with the vertical center line bilateral symmetry of butterfly plate (2), and the cross section of non return stopper (11) is the trapezium structure, and the diameter of the one end that two non return stopper (11) are close to each other is less than the diameter that one end was kept away from each other in two non return stopper (11).

4. A backflow prevention butterfly valve in accordance with claim 1, wherein: the cross section of the diversion rings (8) is of a V-shaped structure, the two diversion rings (8) are arranged in a bilateral symmetry mode by using the vertical center line of the butterfly plate (2), and the diameter of one end, close to each other, of the two diversion rings (8) is smaller than the diameter of one end, far away from each other, of the two diversion rings (8).

5. A backflow prevention butterfly valve in accordance with claim 1, wherein: the two pull rods (10) are respectively positioned at the front end and the rear end of the side surface of the butterfly plate (2), the two pull rods (10) are positioned on the same horizontal plane, and the two pull rods (10) are distributed in an equidistant circumferential array mode according to the axial lead of the butterfly plate (2).

6. A backflow prevention butterfly valve in accordance with claim 1, wherein: the cross sections of the two backflow valves (6) are both circular structures, and the two backflow valves (6) are arranged in bilateral symmetry with the vertical center line of the valve body (1).